The MULi6s Module is a sensor designed to monitor the Li-XX battery voltage, which measures the voltage of each battery cell via the balance connector. It allows you to monitor the voltage of up to 6 Li-XX cells per module.
MVario2 EX is a system that measures atmospheric pressure and using the obtained data it calculates the altitude above sea level, airspeed, and the rate of climb as well as the rate of descent.